run 20260428T215445Z-1870

Summary

Prompt

Start with a 40mm cube, centered in X and Y with the bottom face on the XY plane (so it spans x in [-20, 20], y in [-20, 20], z in [0, 40]). Cut a rectangular pocket into the top face: remove material in x in [-10, 10], y in [-10, 10], z in [30, 40]. The pocket is open at the top, closed on the four sides and the bottom (10mm of cube remains underneath the pocket). Output a single solid.

Checks

params: {
  "type": "valid_solid"
}

details: {
  "root_count": 1,
  "solids_produced": 1
}

params: {
  "type": "bbox",
  "min": [
    -20,
    -20,
    0
  ],
  "max": [
    20,
    20,
    40
  ],
  "tolerance_mm": 0.05
}

details: {
  "actual_max": [
    20,
    20,
    40
  ],
  "actual_min": [
    -20,
    -20,
    0
  ],
  "deviation_max": [
    0,
    0,
    0
  ],
  "deviation_min": [
    0,
    0,
    0
  ],
  "max_abs_deviation_mm": 0,
  "tolerance_mm": 0.05
}

params: {
  "type": "mass_props",
  "volume_mm3": 60000,
  "tolerance_pct": 0.1
}

details: {
  "volume": {
    "actual_mm3": 60000,
    "deviation_pct": 0,
    "pass": true,
    "spec_mm3": 60000,
    "tolerance_pct": 0.1
  }
}

params: {
  "type": "step_roundtrip",
  "tolerance_pct": 0.1
}

details: {
  "per_solid": [
    {
      "bbox": {
        "max_abs_deviation_mm": 0,
        "original_max": [
          20,
          20,
          40
        ],
        "original_min": [
          -20,
          -20,
          0
        ],
        "pass": true,
        "roundtripped_max": [
          20,
          20,
          40
        ],
        "roundtripped_min": [
          -20,
          -20,
          0
        ],
        "tolerance_mm": 0.0692820323027551
      },
      "index": 0,
      "pass": true,
      "volume": {
        "deviation_pct": 0,
        "original_mm3": 60000,
        "pass": true,
        "roundtripped_mm3": 60000
      }
    }
  ],
  "tolerance_pct": 0.1
}

Tool calls

{
  "model": "gpt-5",
  "max_tokens": 8000,
  "system_chars": 1674,
  "user_chars": 455
}

What the model built

isometric render via vcad-render · the model's actual .vcad output, faceted at 28 segments per cylinder · download 20260428T215445Z-1870.vcad

.vcad source

{
  "version": "0.1",
  "nodes": {
    "1": {
      "id": 1,
      "name": "BaseCube",
      "op": {
        "type": "Cube",
        "size": { "x": 40, "y": 40, "z": 40 }
      }
    },
    "2": {
      "id": 2,
      "name": "CenteredBody",
      "op": {
        "type": "Translate",
        "child": 1,
        "offset": { "x": -20, "y": -20, "z": 0 }
      }
    },
    "3": {
      "id": 3,
      "name": "PocketCube",
      "op": {
        "type": "Cube",
        "size": { "x": 20, "y": 20, "z": 10 }
      }
    },
    "4": {
      "id": 4,
      "name": "PocketPositioned",
      "op": {
        "type": "Translate",
        "child": 3,
        "offset": { "x": -10, "y": -10, "z": 30 }
      }
    },
    "5": {
      "id": 5,
      "name": "PocketedCube",
      "op": {
        "type": "Difference",
        "left": 2,
        "right": 4
      }
    }
  },
  "materials": {},
  "part_materials": {},
  "roots": [
    { "root": 5, "material": "default" }
  ]
}

generated 2026-06-19T01:47:55.499Z · static site, regenerate with npm run build -w @mecheval/leaderboard